code: def _read_mlflow_creds_from_env() -> (
      Tuple[Optional[str], Optional[str]]
  ):
      return (
          MLFLOW_TRACKING_USERNAME.get(),
          MLFLOW_TRACKING_PASSWORD.get(),
      )
  
file_path: mlflow/mlflow/utils/credentials.py
imports: import configparser
  import getpass
  import logging
  import os
  import subprocess
  from typing import NamedTuple, Optional, Tuple
  from mlflow.environment_variables import MLFLOW_TRACKING_PASSWORD, MLFLOW_TRACKING_USERNAME
  from mlflow.exceptions import MlflowException
label_desc: Use image node_id 3 for calling a global function with example usage: _read_mlflow_creds_from_env() and returns: MLFLOW_TRACKING_USERNAME,  MLFLOW_TRACKING_PASSWORD